PL
 |
EN
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 5

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available Impact of analysis method on evaluation of ceramic mould surface microgeometry in the lost wax process
Matysiak H., Haratym R., Kwapisz J., Kłębczyk M.
Archives of Foundry Engineering
|
2011
|
Vol. 11, iss. 3 spec.
131--134
EN
In this article two methods of ceramic mould surface microgeometry analysis were presented. First was a contact method, in which Profilometer S3P produced by Perthen Mahr was used. In second optical method optical profiler Veeco NT 9300 was used for surface microgeometry analysis. Evaluation of the results gathered with those methods was made. It was found that optical analysis method of surface microgeometry give better research possibilities (it’s more optimal).
2
Content available remote Jakość odlewów w procesie wytapianych modeli oraz Replicast CS w aspekcie ekologii
Tomasik J., Haratym R., Kłębczyk M.
Archives of Foundry Engineering
|
2010
|
Vol. 10, iss. 2 spec.
151--155
PL
W artykule przedstawiono porównanie jakości odlewów wykonanych metodą wytapianych modeli na bazie modeli z mieszanek otrzymanych głównie z recyklingu z odlewami wykonanymi w procesie Replicast CS. W ramach oceny jakości sprawdzono parametry mikrogeometrii powierzchni odlewów oraz dokładności wymiarowej. Dokładność wymiarowa obejmuje ponadto odchyłki wymiarowe w fazie wykonania modeli wytapianych, modeli z polistyrenu spienionego oraz form ceramicznych. Dokonano oceny jakości odlewów w aspekcie ekologii.
EN
In the article it was presented comparison of castings quality obtained during lost-wax process in case of recycled wax mixture and castings obtained during Replicast CS process. It was verified parameters of castings surface microgeometry and dimension accuracy. Moreover dimension accuracy contain dimension deviation appeared during wax and polystyrene models process and ceramic mould manufacturing. The quality of castings in case of ecology aspects was also verified.
3
Content available remote The surface layer of austempered ductile iron investment castings properties
Myszka D., Kłębczyk M., Zych A., Kwiatkowski L.
Archives of Foundry Engineering
|
2009
|
Vol. 9, iss. 1
157-162
EN
The article presents a unique process of carbonnitriding and nitriding the precision casting surfaces of austempered ductile iron. The results of the research are pointing that adequate process parameters allow to obtain multiple increase of wear resistance and a significant increase of corrosion resistance. Also, changes of cast microstructure and hardness are presented.
4
Content available remote Microstructure transformation during plastic deformation of the austempered ductile iron
Myszka D., Olejnik L., Kłębczyk M.
Archives of Foundry Engineering
|
2009
|
Vol. 9, iss. 1
169-174
EN
Excellent properties of ADI (Austempered Ductile Iron) are widely praised by the world technical literature. These properties depend on the cast iron microstructure formed during the heat treatment process of a specific type. The matrix of ADI is a mixture of lamellar ferrite and high-carbon austenite. It seems, however, that it is the austenite that is responsible for the high strength and ductility of this material, although investigations and analyses have proved that it is not homogeneous. Various types of austenite found in the ADI matrix include unreacted austenite, stable austenite, and metastable austenite which will be transferred into martensite during machining of castings. In this study an attempt has been made to determine the fraction of metastable austenite and to evaluate its effect on ADI properties. The heat treatment enabled manufacturing ADI characterised by the following properties: T.S.>1000MPa, El.>10%, Y.S.>600MPa. As a next step, the controlled process of plastic deformation of the samples was carried out. Applying the new method it has been established that due to 15% cold work, the structure of the examined ADI contains 9% of martensite; this volume fraction goes up to 17% after 25% cold work. The results of the investigations were cofirmed by X-ray diffraction pattern analysis and magnetic measurements. Consequently, it has been proved that ADI characterised by properties satisfying the criteria of an international standard developed for this particular material contains a large amount of metastable austenite subject to the TRIP (Transformation Induced Plasticity) effect.
5
Content available remote Gas flow through a multilayer ceramic mould in lost wax foundry process
Matysiak H., Haratym R., Kłębczyk M.
Archives of Foundry Engineering
|
2009
|
Vol. 9, iss. 2
155-158
EN
The paper deals with the issues of permeability testing of ceramic moulds used in lost wax foundry process. The main issue in the testing is to provide proper specimens of ceramic moulds (CM). The moulds have to be repeatable and must be free of internal defects of microcrack type that are formed mainly during the removal of patterns from CM in the course of heat treatment. Moreover, the process of forming ceramic moulds must be similar to the general industrial process of CM moulds making regarding their anisotropic structure. The permeability parameter reflecting gas flow through multilayer ceramic moulds was also examined with attention to the investment casting shape accuracy.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.